The Best 3-Week (21-Day) Tours in Southeast Asia

Southeast Asia

Ready for a 21-day journey to Southeast Asia that combines relaxation, adventure, and cultural discovery? We've combed through a wide range of multi-day guided tours, meticulously analyzing them based on service, price, guest ratings, and activities. These 3-week tours to Southeast Asia are the absolute best based on these criteria, so that your trip planning can be easy and fun. They offer the perfect balance between a leisurely holiday and thrilling escapades, allowing you to immerse yourself in the essence of each destination for a full three weeks! From exploring famous landmarks to savoring the local cuisine, every activity on these guided tours is designed to provide an enriching and unforgettable experience. Get ready to embark on the adventure of a lifetime and make the most of your epic escape with one of these amazing tours below.


The Top 3:

  • 21 Days, $2279.00

  • 20 Days, $5160.00

  • 20 Days, $3055.00

Which 21-day tour options are available in Southeast Asia?

Southeast Asia

Here are the important factors:

  • 41 trip options analyzed
  • $125 average price per day (USD)
  • 20 to 21 days in length
  • 4.84 of 5 average rating
  • 17 people or less on average

You'll be surprised at the array of tours lasting 3 weeks in Southeast Asia, as there is something for everyone. It's no wonder that visitors can't get enough of these tours, boasting an impressive average guest rating of 4.84 out of 5 stars. Picture yourself joining a group of like-minded adventurers, with an average maximum size of 17 people, ensuring a fantastic blend of social and personalized experiences. The average tour length spans 20 days, with tours ranging from 20 to 21 days long. For physical activity, you'll find tours classified as easy, moderate, relaxing, and serious, with most of them being easy. With our thorough analysis of 41 tours lasting 3 weeks, we've found the best. So rest assured that Southeast Asia has something to captivate every kind of traveler.

(All tour prices are in US Dollars before taxes, and come from a base price that is reported by TourRadar. Peak season prices can vary significantly, particularly in destinations where seasonal travel fluctuates dramatically.)

So, let's get to it and see...

The 10 Best 3-Week Tours in Southeast Asia
  • Great Value: the daily price is lower than average for tours lasting 3 weeks.
  • High Quality: guest ratings are higher than average.
by Bravo Indochina Tours
starstarstarstarstar
4.9 rating



21 Days Hanoi to Phuket 10 Destinations through Vietnam, Cambodia, Thailand 15 People at Most Ages 1 to 99 Guest Rating: 4.9 out of 5 stars

This fantastic trip has a rating of 4.9 out of 5 stars, visiting Vietnam, Cambodia, and Thailand. Along the way, this journey encompasses 10 destinations, including Halong Bay, Hoi An, Ho Chi Minh City, and Mekong Delta. Your journey will begin in Hanoi and end in Phuket. Lasting 21 days, the maximum group size is 15 people, and it's good for guests of all ages. Organized by Bravo Indochina Tours, this is a great deal because it's only $109 per day.

  • Sightseeing
  • Family
$2,279
TourRadar

  • On Sale: 50% Off
  • High Quality: guest ratings are higher than average.
by Legend Travel Group
starstarstarstarstar
5.0 rating



20 Days Hanoi to Phuket 20 Destinations through Vietnam, Thailand 12 People at Most Ages 1 to 99 Guest Rating: 5.0 out of 5 stars

With a stellar 5 out of 5 rating, this extraordinary voyage, visiting Vietnam and Thailand, is the perfect choice. Rest assured, this trip is all about local culture and family-friendly activities, guaranteeing an unforgettable adventure. This itinerary covers 20 captivating destinations, with stops in My Tho, Ben Tre, Mekong Delta, and Bangkok, among others. Begin your trip in Hanoi and complete it with a memorable finale in Phuket. Spanning across 20 days, the voyage accommodates 12 individuals, and is suitable for guests of all ages. Offered by Legend Travel Group, this remarkable voyage is priced at just $159 per day. Take advantage of the current sale and secure your spot today! Don't miss out on this incredible experience.

  • Sightseeing
  • In-depth Cultural
  • Historical
  • Family
$5,160 $2,580
TourRadar

  • High Quality: guest ratings are higher than average.
by Swallow Travel
starstarstarstarstar
5.0 rating



20 Days Ho Chi Minh City to Luang Prabang 13 Destinations through Vietnam, Cambodia, Laos 12 People at Most Ages 1 to 88 Guest Rating: 5.0 out of 5 stars

This exceptional trip offering by Swallow Travel has received a 5 out of 5 rating. On this 20-day trip, visiting Vietnam, Cambodia, and Laos, you can unwind while also making new memories. Immerse yourself in a travel experience that includes 13 destinations, featuring Halong Bay, Siem Reap, Angkor Wat, and Tonle Sap Lake. Your journey starts off in Ho Chi Minh City and finishes in Luang Prabang. With a group size of 12 people, it's suitable for guests age 1 to 88. This extraordinary adventure also revolves around local culture and family-friendly activities. This remarkable trip is priced at an unbeatable $153 per day.

  • Sightseeing
  • In-depth Cultural
  • Family
$3,055
TourRadar

  • High Quality: guest ratings are higher than average.
by Intrepid Travel
starstarstarstarstar
5.0 rating



20 Days Phnom Penh to Hanoi 10 Destinations through Cambodia, Vietnam 12 People at Most Ages 15 to 99 Guest Rating: 5.0 out of 5 stars

Check out this trip that has received rave reviews, earning a stellar 5 out of 5 rating, visiting Cambodia and Vietnam. Uncover the beauty of 10 destinations on this itinerary, with highlights such as Hoi An, Hue, Lang Co, and Hanoi. Your journey will begin in Phnom Penh and end in Hanoi. Spanning across 20 unforgettable days, this voyage offers an intimate group experience with 12 participants, and it's great for guests age 15 and older. Brought to you by the renowned Intrepid Travel, this exceptional opportunity is priced at an incredible $205 per day - an unbeatable value.

  • Sightseeing
  • Historical
  • Temples
$4,091
TourRadar

  • High Quality: guest ratings are higher than average.
by VietLong Travel
starstarstarstarstar
5.0 rating



20 Days Ho Chi Minh City to Hanoi 15 Destinations 20 People at Most Ages 2 to 80 Guest Rating: 5.0 out of 5 stars

This 20-day journey is ideal for guests age 2 to 80. And priced at only $178 per day, it's a great value, too. You're in for an epic adventure with a strong emphasis on local culture and family-friendly activities. Traverse through 15 enchanting destinations, with Dalat, Phan Rang, Nha Trang, and Hoi An among the must-see stops along the route. Begin your trip in Ho Chi Minh City and complete it with a memorable finale in Hanoi. It's offered by VietLong Travel, a very popular company with rave reviews and knowledgeable guides.

  • Sightseeing
  • In-depth Cultural
  • Family
$3,559
TourRadar

  • High Quality: guest ratings are higher than average.
by Intrepid Travel
starstarstarstarstar
5.0 rating



20 Days Phnom Penh to Hoi An 10 Destinations through Cambodia, Vietnam 12 People at Most Ages 15 to 99 Guest Rating: 5.0 out of 5 stars

Priced at just $196 per day, this terrific 20-day trip, visiting Cambodia and Vietnam, is ideal for guests age 15 and older. This trip visits 10 destinations, including Hanoi, Ninh Binh, Halong Bay, and Siem Reap along the way. Your journey starts off in Phnom Penh and finishes in Hoi An. Organized by the reputable Intrepid Travel, this is one of the best tours on this list.

  • Sightseeing
  • Historical
$3,919
TourRadar

  • On Sale: 40% Off
by Hoi An Express
starstarstarstarstar
4.8 rating



21 Days Bangkok to Angkor Wat 17 Destinations through Thailand, Laos, Vietnam, Cambodia 15 People at Most Ages 1 to 99 Guest Rating: 4.8 out of 5 stars

Check out this incredible journey that has received a 4.8 out of 5 rating from previous guests, visiting Thailand, Laos, Vietnam, and Cambodia. With an emphasis on local culture and family-friendly activities, you know you'll have an amazing adventure. With a duration of 21 days, this journey ensures an intimate group size of 15 people, and is good for guests of all ages. Experience a trip that takes you to 17 remarkable destinations, including Damnoen Saduak, Chiang Mai, Luang Prabang, and Pak Ou. Your journey will begin in Bangkok and end in Angkor Wat. This fantastic option, organized by Hoi An Express, presents an unbeatable value at just $148 per day. Act fast to take advantage of the current sale.

  • Coach / Bus
  • In-depth Cultural
  • Family
$5,172 $3,103
TourRadar

  • On Sale: 30% Off
  • Great Value: the daily price is lower than average for tours lasting 3 weeks.
  • High Quality: guest ratings are higher than average.
by G Adventures
starstarstarstarstar
5.0 rating



21 Days Bangkok to Ho Chi Minh City 13 Destinations through Thailand, Vietnam 18 People at Most Ages 18 to 39 Guest Rating: 5.0 out of 5 stars

Spanning over 21 days, this journey, visiting Thailand and Vietnam, has a maximum size of 18 individuals. Welcoming guests age 18 to 39, it is organized by G Adventures, a very popular company with plenty of great reviews. Explore 13 incredible locations on this trip, including Nha Trang, Mui Ne, Kanchanaburi, and Sukhothai. Begin your trip in Bangkok and complete it with a memorable finale in Ho Chi Minh City. Available at an unbeatable price of only $61 per day, this option also has a rating of 5 out of 5 stars from previous guests. Don't miss out on this limited-time sale.

  • Historical
$1,829 $1,280
TourRadar

  • On Sale: 40% Off
  • Great Value: the daily price is lower than average for tours lasting 3 weeks.
by G Adventures
starstarstarstarstar
4.6 rating



20 Days Bangkok to Hanoi 12 Destinations through Thailand, Cambodia, Vietnam 18 People at Most Ages 18 to 39 Guest Rating: 4.6 out of 5 stars

Here's your chance to take off on an exceptional journey, visiting Thailand, Cambodia, and Vietnam, that has garnered a 4.6 out of 5 rating. With a duration of 20 days, this jouney will have 18 participants, and it warmly welcomes guests age 18 to 39. Expertly organized by G Adventures, this amazing trip is an incredible value at just $57 per day. It's also on sale right now!

  • In-depth Cultural
$1,899 $1,139
TourRadar

by Explore!
starstarstarstarstar
4.6 rating



21 Days Hanoi to Siem Reap 14 Destinations through Vietnam, Cambodia 16 People at Most Ages 16 to 85 Guest Rating: 4.6 out of 5 stars

This memorable journey, visiting Vietnam and Cambodia, is offered by Explore! which has received plenty of positive reviews. The trip itself has a guest rating of 4.6 out of 5 stars, and is priced affordably at $128 per day. This trip takes you on an adventure to 14 destinations, including Siem Reap, Tonle Sap Lake, Chong Kneas, and Thanh Hoa. Your journey will begin in Hanoi and end in Siem Reap. The maximum group size is 16 people, welcoming guests age 16 to 85.

  • Hiking & Trekking
  • In-depth Cultural
  • Walking Tour
$2,690
TourRadar

See also The Best Family-Friendly Tours to Southeast Asia, The Best Wildlife Tours to Southeast Asia, The Best Hiking & Trekking Tours in Southeast Asia, The Best Historical Tours in Southeast Asia, The Best 10-Day Tours in Southeast Asia, The Best One Week (7-Day) Tours in Southeast Asia, The Best 3-Day Tours in Southeast Asia, The Best 2-Week Tours in Southeast Asia, The Best 4-Week (1-Month) Tours in Southeast Asia, The Best Extended Trip Tours in Southeast Asia, One Month or Longer, The Best River Cruises in Southeast Asia, The Best Bicycle Tours in Southeast Asia, Tours for Outdoor and Nature Lovers in Southeast Asia, The Best Christmas & New Years Tours in Southeast Asia, The Best Coach Bus Tours in Southeast Asia, The Best Adventure Tours to Southeast Asia, The Best Eco Tours in Southeast Asia, The Best Train & Rail Tours in Southeast Asia, The Best Thrill-Seeking Tours in Southeast Asia, The Best Scuba Diving Tours in Southeast Asia, The Best Water Sports Tour Packages in Southeast Asia, The Best White Water Rafting Tours in Southeast Asia, The Best Art History, Museums, and Cultural Tours Tours in Southeast Asia, The Best Sightseeing Tours in Southeast Asia, The Best Cultural Tours in Southeast Asia, The Best Food and Culinary Tours in Southeast Asia, The Best Music Tours in Southeast Asia, The Tours for Animal Lovers in Southeast Asia, The Best Volunteering Tours in Southeast Asia, The Best Camping Tours in Southeast Asia, The Best Romantic Tours for Couples in Southeast Asia, The Best Safaris in Southeast Asia, The Best Budget Safaris in Southeast Asia, The Best Nightlife Tours in Southeast Asia, The Best Religious Tours in Southeast Asia, The Best Yoga Tours and Retreats in Southeast Asia, The Best Walking Tours in Southeast Asia, The Best Mountain Biking Tours in Southeast Asia, The Best Honeymoon Tours in Southeast Asia, The Best Tours Under $1000 in Southeast Asia, The Best Luxury Tours to Southeast Asia, The Best Budget Tours to Southeast Asia, The Best Tours for Seniors to Southeast Asia, The Best Contiki Tours to Southeast Asia, or The Best G Adventures Tours to Southeast Asia for more tour ideas. With so many options, there's a guided tour or vacation package for every type of traveler.

How much do 21-day tours to Southeast Asia cost?

Average Daily Price 3-Week Tours
$125

Visitors will find a large range of terrific options for tours lasting 3 weeks when planning a visit to Southeast Asia. The price of these specific trips can vary according to length, destinations, and travel style. The average price of tours lasting 3 weeks in Southeast Asia based on data from 41 options is an affordable $125 per day. If you're interested in more information about tours here, see our guide to tour prices in Southeast Asia.


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